Drill-sharpener.



D. E. GILSON.

DRILL SHABPENERL APPLIOATIOI nun 10. 25. 1901.

Patented Oct. 27, 1908.

1m: Nomus PETERS ca, umsmrvnmn. o. c.

DORSEY E. GILSON, OF OOALINGA, CALIFORNIA.

' DRILL-SHARPENER.

Specification of Letters Patent.

Patented Oct. 27, 1908.

Application filed November 25, 1907. Serial No. 403,817.

To all whom it may concern:

Be it known that I, DORSEY E. GILsoN, a the anvil.

citizen of the United States, residing at Coalinga, in the county of Kern and State of California, have invented a new and use ful Drill-Sharpener, of which the following is a specification.

My invention relates to drill sharpeners and has for its object to provide simple and eflicient mechanism, by means of which the weight of the drill bits used in boring oil wells can be utilized for sharpening the bit by causing the bit to be dropped endwise upon a suitably shaped stationary die or anvil.

The means employed atthe present time for sharpening drill bits of oil drilling appliances consist in heating the edge or cutting end in a suitable forge and then hammering or battering said end so as to sharpen the same by upsetting it and restoring the sharp or cutting edges which have become worn in the process of drilling the wells. Owing to the fact that these bits are necessarily massive and heavy, weighing from 800 to 1500 pounds apiece, it at once becomes apparent that the present method is extremely slow and very laborious and requires the labor of several men to accomplish the desired result, besides requiring considerable time and consuming considerable fuel in the repeated heats of the bit before the work can be finished.

By means of the apparatus which I have invented, the bit can be accurately and quickly sharpened by securing it in suitable reciprocatory mechanism and successively dropping it upon a suitable die or anvil. This can be accomplished by less help than with the old way as the ordinary drilling mechanism is utilized for actuating the drill, and the work is so quickly accomplished that usually but one heating of the drill is required.

In the accompanying drawings which illustrate the invention: Figure is a broken front elevation of one form of mechanism that may be employed in practicing the invention. Fig. 2 is a central vertical sectional view of the same taken at right angles 'to Fig.1. Fig. 3 is a broken top view. Fig.

4 is a longitudinal sectional view through Fig. 5 is a detailed View.

Referring more particularly to the drawings which are for illustrative purposes only, and therefore are not drawn to any particular scale, 1 indicates a base upon which are vertically mounted suitable guides, each of which preferably consists of longitudinally slotted standards 2. These guides or standards may be formed integral, if de sired, but are preferably constructed of separate side pieces which are faced upon their inner or adjacent sides and suitably spaced apart by blocks 3. The upper ends of the guides are also spaced apart by cross pieces 4.

Reciprocally mounted upon or within the guides or standards is a suitable frame for holding and guiding the drill 5. This frame may be constructed in any suitable manner, but I prefer to form it from two cross heads 6 and 7 which are rigidly spaced apart by suitable strips or braces 8. Each cross head is provided with means for engaging with the guides or standards, in the present instance with ears or projections 9, which are adapted to engage with the respective bars or side pieces of the guides, the ends and projections of said cross heads being preferably babbitted to secure accuracy and. freedom of movement.

The upper cross head is perforated vertically as shown at 10, within which is reciprocally mounted a socket 11. The socket is rotatable and perforated concentrically as shown at 12, with the lower end of the perforation enlarged so as to form a recess 13 for the reception of the stem i l of the drill 5, said recess being screw-threaded to correspond with the screw-threads on the stem and the exterior of the socket 11 being preferably formed with fiat faces in the ordinary manner for the reception of a wrench or other means of rotating the socket to screw it down upon the stem of the drill. The socket is provided with a shoulder 16 for engaging with the under face of the upper cross head, 6 and limiting the upward movement of the socket relatively to said cross head, and its downward movement is preferably limited in any suitable mannor as by means of a hollow rod or stem 1': which is loosely seated within the perforation 12. The upper end of said rod is provided with a head 18 which is of a greater area than the diameter of the socket and is adapted to rest on top of the cross head 6 when the socket occupies its lowest position relatively to said head, the head being preferably provided with an annular wear plate 19 which is secured therein in any desirable manner, as by being sunk into the upper face of the head and secured by screws or bolts in the ordinary manner.

The lower end of the stem or rod 17 is provided with a head 20 which is preferably adapted to be seated in a recess 21 at the upper end or bottom of the recess 13. The lower face of said head 20 is preferably countersunk, as shown at 22, for the recep tion of the end of a cable 23 which is secured therein in any suitable manner, said cable extending up through the hollow of the stem 17. The stem 17 is a few inches longer than the length of the perforation 12 in the socket 11 so that when the head 18 is resting upon the cross head 6, the lower end of the socket will be a suitable distance below said head for engaging with the stem of the bit and thereby permit of the easy engagement of the socket with said bit which would otherwise be very difficult or impossible if the entire weight of the cross head had to be lowered onto said bit to effect the union of the socket with the bit.

The cable 23 is passed vertically above the top of the standards 2 and over a pulley 24 which is journaled in suitable bearings 25 mounted upon the cross pieces l. The periphery of the pulley 24 is so arranged as to be exactly in line with the stem 17, and the free end of the cable is preferably connected with the usual drilling mechanism as the crank or wrist pin, whereby the frame and bit can be drawn upward and then released so as to fall by gravity in the same manner as when using the bit in drilling the well. As the particular means for connecting the cable with the drilling mechanism can be effected in any suitable manner and forms no part of the present invention, it has not been shown.

A suitable die or anvil 26 is located at the bottom of the standards 2 in position for receiving the lower end of the bit when the same is dropped thereon in the manner as above described. The anvil is preferably seated upon a solid foundation and secured thereon by means of flanges 27 which are bolted to the foundation in any suitable manner, and the upper face of the anvil is projected through an opening 28 in the base 1 with its forming surface a suitable distance above said base. The shape or contour of the upper or forming face of the anvil is formed in accordance with the shape which it is desired to give to the lower end of the bit similar to the formation of a die. In the present instance the upper face of the anvil is inclined downward toward each end and recessed longitudinally so as to make said inclines trough shaped in cross section as shown at 29. A removable fuller 30 is preferably provided for the middle of the anvil which can be seated in a transverse groove or recess 31 and rigidly held therein by means of a bolt 32 which passes through a depending arm 33 at one end of the fuller and into the body of the anvil as by means of a perforation 34. The upper face of the fuller is made to conform with the inclined walls of the upper face of the anvil except when it is desired to provide means for forming or keeping open the water course 35 in the side of the bit when the ends of the fuller are provided with upward extensions 36, as shown in Fig. 5, of the proper size and shape to enter said water courses and preserve their contour when the bit is dropped upon the anvil. The fullers are made removable, as above described, for the purpose of substituting one for the other, as necessity may require. To further ,assist in giving the end of the bit the proper shape and contour, two adjustable fullers 37 are arranged to be secured at the ends of the grooves or trough shaped recesses 29 by means of bolts 38 which pass through slots 39 in said fullers down into perforations 4-0 in theanvil. The inner end or face of each fuller 37 is given the necessary shape or contour to fashion the outer edge of the bit and to prevent its wedging therein as by slightly concaving said end as shown at 41, and slightly inclining it upward and outward.

The bit 5 is centrally or accurately secured within said reciprocatory frame by bowing or recessing the lower cross head 7 as shown at 4:2, and providing its end with adjustable screws or bolts 43. The recess 42 is large enough to permit bits of different sizes to hang perfectly free therein, and the screws 43 are so arranged as to engage with the bit upon opposite sides and thereby hold it perfectly true and rigid. For this purpose the bits are preferably provided with recesses stat for the reception of the ends of the screws after the socket 11 has been firmly secured to the stem or upper end of the drill. These recesses are formed in the bit before the bit is to be sharpened, as by accurately placing the bit in the frame and upon the anvil, and then marking the points at which the inner ends of the screws engage therewith, and then taking the bit out and forming said holes or recesses.

As the frame comprising the cross heads and brace strips is of considerable weight, I prefer to raise the same preparatory to securing a bit therein by suitable power mechanism, a block and tackle device 45 being shown in the drawing which is connected with the frame and one of the cross pieces l, respectively, as by means of eye-bolts 46. The free end 47 of the rope of the block and tackle l5 can be drawn upon or manipulated in any suitable manner, an ordinary windlass being preferable, but as such construction forms no part of the invention and may be made in any suitable manner and located at any suitable point, it is not shown in the drawings.

In using drill sharpening mechanism, as above described, the device is preferably located adjacent to the forge in which the drill bit is to be heated and providing suitable hoisting means for lifting the bit from the forge to the sharpener. After the bit has been sufiiciently heated, it is then transferred to its position between the standards with its lower end preferably resting upon the anvil and its upper end in position for being engaged by the socket in the upper cross head. As soon as the socket has been secured to the upper end of the bit, the frame is then elevated so as to permit the bit to hang free so that it can be accurately centered or adjusted by means of the screws or bolts 43. As soon as it has been properly secured in the frame, the hoisting mechanism 4.5 is detached from the frame and the free end of the cable 23 is connected with the drilling mechanism which will immediately cause the frame and the bit to be alternately raised from and dropped upon the anvil. A few blows of the bit upon the anvil will be sufficient to swage or upset the lower end of the bit and restore its edges or cutting surfaces to their original or any desired shape and contour, after which the bit may be removed from the frame and connected with the regular drilling mechanism when ever desired. The pulley 24 at the upper ends of the standards 2 is preferably arranged at a slight angle or inclination so as to permit of the sharpening mechanism being located at one side of the well drilling mechanism and yet permit of the cable being run in a direct line to the drill actuating mechanism. In this manner the process of sharpening the bit can be conducted by means of the drill mechanism without stopping the process of drilling, and the operation can be formed much more expeditiously and accurately than by the present method.

Having described my invention, I claim:

1. In a drill sharpener, an anvil having its upper face formed into a die and recessed transversely, a fuller removably seated in said recess provided with a perforated depending arm and having its upper face corresponding with the surface of the die, a bolt through said arm, an adjustable fuller at each end of the anvil, and means for alternately moving a drill longitudinally relatively to the anvil.

2. In a drill sharpener, an anvil having its upper face formed into a die with its ends perforated, a fuller at each end of the die having its inner end concaved and tapered and its body provided with a longitudinal slot, a bolt through each slot into the perforation of the die, a fuller removably secured to the center of the die, and means for alternately moving a drill longitudinally relatively to the anvil.

3. In a drill sharpener, an anvil having its upper face formed as a die, vertically arranged slotted standards, a frame reciprocally mounted on said standards provided with projections for fitting in said slots, means in the upper portion of said frame for engaging with a drill bit, means in the lower part of the frame for adjustably securing said bit in position, and means for reciprocating the frame.

4:. In a drill sharpener, an anvil having its upper face formed into a die, vertically arranged slotted standards, a frame reciprocally mounted in said standards comprising two cross heads and spacing strips, a socket mounted in the upper cross head and adjusting screws in the lower cross head.

5. In a drill sharpener, an anvil having its upper face formed into a die, vertically ar ranged standards provided with a pulley at their upper ends, a frame reciprocally mounted between said standards comprising a perforated upper cross head and a recessed lower cross head and vertically arranged connecting strips, a socket rotatably mount ed in the perforation of the upper cross head and provided with means adapted for engaging with the stem of a drill bit by ro tary movement, inwardly projecting screws in the ends of the lower cross head, and a cable connected with said socket and extending over said pulley for reciprocating said frame.

6. In a drill sharpener, an anvil having its upper face formed into a die, vertically arranged standards having a pulley at their upper ends, a frame reciprocally mounted between said standards comprising a perforated upper cross head and a lower recessed cross head and vertical connecting pieces, a longitudinally perforated socket in the perforation of the upper cross head having its lower end recessed and screwthreaded for engaging with the stem of a drill bit, a hollow rod reciprocally seated in the perforation of the socket, said rod being longer than the perforation in said socket with its lower end provided with a head for engaging with the bottom of the screwthreaded recess and its upper end provided with a head for engaging with the upper cross head, :1 cable through. said rod with its lower end secured in the lower head and having its main portion extended up over said pulley for actuating said frame and means in the lower frznne for adjustably securing a drill bit in position.

In testimony whereof, I have hereunto set my hand at Los Angeles California this 26th day of October 1907.

DORSEY E. GILSON.

In presence of lV. S. BOYD, G. C. GILSON. 

